Millstone-dress.



W. VAN NOSTRAND.

MILLsToNE DRESS.

1,142,209. APPLICATION man sfrmo. 1914. Patented June 8, 1915.

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MILLSTONE DRESS.

APPLICATION FILED SEPT. l0, 1914.

1 1 42,209 Patented June 8, 1915.

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Wiliam Van Nostrand.

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section taken on the line WILLIAM. VAN NOSTRAND, 0F DALTON, NEW YORK.

MILLSTONE-DRESS.

Specification of Letters Patent.

Patented J une 8, 1915.

Application filed September 10", 1914. Serial No. 861,094.

T0 all whom it may concern B'e it known that 1, WILLrAiw VAN Nos T1msn, citizen of they United States, residing at Dalton, in the county of Livingston, and. State of New, York, have' invented certain new andi useful Improvements in Milf stoneeDresses; and I do do declare the following to be af full, clear, and. exact description of the invention, such as will enable others skilled inthe art to which it appertains to maske and use the same.

My invention relates to improvements in mill stone dresses and has for its objects to improve the construction of devices of this character to such an extent as to prevent packing of the feed or grain between the grinding ribs, to so construct and position said ribs as to cause the same to wear evenly, to construct certain of the crushing ribs in such a manner as to allow the same to more readily catch the grain, and to provide, between the free end of a number of V-shaped ribs employed, a number of transverse finishing ribs of less height than said V-shaped ribs, whereby the ground feed may be gradually and evenly discharged from the mill without the necessity of springing the plates apart, thus overcoming undue friction.

A further object is to provide, in connection with certain of the V-shaped ribs and the transverse ribs located between the arms thereof, a number of ridge shaped grinding and finishing ribs so constructed as to normally hold the grain against the cutting edges of said V-shaped ribs.

Yet another object is to improve upon the construction of the grinding and crushing ribs to such an extent as to allow the feed, being ground, to beL readily fed outwardly from the interior of the grinding plate to the exterior thereof.

With the above and minor objects in view, the invention resides in certain novel features of construction and combination herein described and claimed and shown in the drawings wherein:

Figure 1 is a plan view of one of the segmental plates employed for producing a grinding wheel in accordance with my invention. Fig. 2 is a transverse section taken on the line 2--2 of Fig. 1. Fig. 3 is a similar view taken on the radial line 3-3 of Fig. 1. Fig. 4 is a view similar to Fig. 3 taken on the line 4-4 of Fig. 1. Fig. 5 is a transverse 55 thereof. Fig.

6 is a view similar to Fig. 1 showing a slightly different form of construction. Fig. 7 is a vertical section taken on the radial line 77 of Fig. 6,v and Fig.. 8 is a transverse section taken on the line 8-8 of Fig. 6.

Int the first five figures of the drawings, 1 have illustrated a portion of my improved. mill stone dress, said portion comprising a segmental pla-te 1 which is adapted to be scoured in a well-known manner to a rotated disk (not shown). Located at the extreme outer curved edge 2 of the plate 1, is a series of V-shaped ribs 3 which are here shown as being rectangular in transverse section and as havingV the free ends 4 of their arms contacting' one with the other and terminai ing flush with the edge 2.

Interposed between the free ends 4 of each rib 3, is a plurality of transverse ribs 5 whose opposite endsv are preferably integrally united with said ends 4 while the inner sides of said ribs 5, at their opposite end portions, are beveled as indicated at 7, said bevels 7 blending with similar bevels 8 of radial ridge shaped ribs 9 whose outer ends are integrally united with the inner sides of the ribs 5 while their inner ends abut and are preferably formed integrally with the inner angles of the V-shaped ribs 3, the bevels 8 being formed by gradually decreasing the height of the ribs 9 from their radial centers 10 to their extreme outer edges 11, said outer edges contacting with and being preferably formed integrally with the inner sides of the diverging arms constituting the V-shaped ribs 3.

Spaced inwardly from the ribs 3, is a zig Zag rib 12 whose outer angular corners pro ject into the spaces between the outer angular corners of the ribs 3 as clearly shown in Fig. 1, while spaced still farther inwardly, is a second zig zag rib 13 whose outer angular corners project into the spaces between the` outer angular corners of the ribs 12. This positioning and arrangement of the ribs 12 and 13 constitutes no part of the present invention but I have improved upon the construction of said ribs 12 and 13by providing the inner angular corners of their active surfaces with tapered grooves or notches 14 whose formation is most clearly seen in Figs. 1 and 3, this construction of parts allowing the feed to be more readily fed outwardly in a manner to be described.

Arranged at spaced intervals upon the inner edge portion of the plate 1 is a plurality of comparatively long tapered crushing ribs 15 whose active surfaces are provided with radial grooves 16 which increase in depth from their outer to their inner ends as clearly illustrated in Fig. 4, while interposed between the ribs 15, and spaced outwardly from the inner curved edge of the plate 1, is a plurality of similar crushing ribs 15 which are of less length and which are provided with grooves 16 formed similarly to the grooves 16 before described. By reference more particularly to Figs. 1, 3 and 4 it will be seen that the central rib 16 upon each segmental plate 1 is beveled at its inner end as indicated at 17 to an extent greater than the bevel 18 of the endmost ribs, this formation allowing said endmost ribs to more readily catch the grain fed to the grinding plates.

By constructing the device as above set forth, it will be seen that the ribs l5 and 15 will effectually crush the grain fed between the two grinding plates, it being understood that upper and lower plates are employed, after which the crushed grain is acted upon by the zig zag ribs 12 and 13, the ribs of the upper plate contacting with the ribs of the lower plate. As the upper plate is rotated upon the lower one, or vice versa it will be seen that the recesses between the ribs 12 and 13 in the upper plate will register with similar recesses in the lower plate, thereby causing the feed in the upper recesses to be deposited in the lower recesses whereby said feed is effectually fed outwardly toward the periphery of the grinding wheel. It will be understood that the action of the ribs 12 and 13 upon the feed reduces the same to a comparatively ine powder and that this powder may more readily iow toward the periphery of the grinding wheel by the provision of the grooves 14, said grooves likewise providing supplemental cutting or grinding edges 14.

It will be noted that the inner angular cutting edges of the V-shaped ribs 3 are provided with grooves 14 similar to the grooves 14 whereby the feed may be more readily conducted into the spaces between the arms of said V-shaped ribs in which spaces the feed is now acted upon by the beveled surfaces 7 and 8 of the ribs 5 and 9, these bevels now holding the powdered feed against the cutting edges of the ribs 3 and causing the same to be reduced to a still finer powder, which powder may now be discharged between the active edges of the transverse ribs 5, without the necessity of the upper and lower plates being forced one from the other, since said ribs 5 are of less height than the ribs 3 and the remaining ribs upon the plate 1, thereby allowing the ground and powdered feed to be gradually and continually discharged. This is an eX- tremely important feature of the invention since, with the form of plates now commonly used, it is necessary for the upper and lower plates to be forced one from the other to allow the feed to be discharged from the edge thereof, this movement on the part of the upper and lower plates allowing unground particles of feed to pass from the inner to the other portions of the grinding plates without being effectually ground with the result that practically all of the grinding is done by the outermost ribs of the grinding plates, thereby causing said outermost ribs to be subjected to greater wear than the inner ribs. This, in time, absolutely destroys the effective operation of such grinding plates but is effectually overcome by constructing the device in accordance with the above description.

It may here be explained that by providing the grooves 16 and 16, in the ribs 15 and 15, the active wearing surfaces of said ribs is decreased, thereby causing the same to wear in proportion to the amount of wear incurred by the outer ribs, thus insuring that all grinding faces of the entire device will properly contact at all times.

From Figs. 6 to 8 inclusive, I have illustrated a segmental grinding plate 1 whose inner and intermediate portion is constructed in identically the same manner as the plate previously described, further description thereof being therefore thought to be unnecessary. The outer edge portion of the plate 1, in this instance, is provided with a number of V-shaped ribs 3 constructed similarly to the ribs 3 and with radial ribs 20 which are of the same height as the ribs 3, said ribs 20 having their inner end portions gradually decreased in thickness toward their extreme inner ends as indicated at 21. By the provision of the radial ribs 20 between the arms of the V-shaped ribs 3 it will be seen that each V-shaped rib is converted into a pair of V-shaped ribs, thus increasing the grinding area of the device. Interposed between the free ends of the radial ribs 2() and the free ends of the V- shaped ribs 3 are a number of transverse ribs 5 which are of less height than said ribs 3 and 20, said ribs 5 corresponding to the ribs 5 previously described. Substantially radial ridge shaped ribs 9 are also provided which extend inwardly from the ribs 5 and which gradually decrease in height and width in the same manner as the ribs 9 previously described.

From the preceding description of the form of the invention illustrated in Figs. 6 to 8 inclusive, taken in connection with the description and illustration of the form previously described it will be seen that both forms include V-shaped ribs, transverse ribs united at their opposite ends to the free ends of the V-shaped ribs and ridge shaped ribs united at their opposite ends with said transverse ribs and the V-shaped ribs, these features being generic to both forms, while, in connection with` said generic features, the form of the inventiony illustrated from Figs. 6 to 8l includes a supplemental radial rib having its inner end gradually decreased in thickness.

Frome the foregoing description and careful inspection of the accompanying illustration, it will be seen that although l have produced an extremely simple grinding plate for the purpose set forth, the same will be highly efficient in operation and may be operated* with considerably less friction than the type of plates now commonly employed, this not only being due to the provision of the grinding ribs as hereinbefore set forth but to the fact that the ribs 5 and 5 are of less height than the remaining ribs, thereby allowing the ground feed to be continually discharged without the necessity of forcing the upper and lower plates one from the other.

Having thus described my invention, what l claim as new and desire to secure by Letters-Patent is:

l. rl`he combination with a rotatable plate and a plurality of V-shaped ribs thereon, of a plurality of transverse ribs interposed between the free ends of said V-shaped ribs and joined thereto, said transverse ribs being of less height than the V-shaped ribs.

2. The combination with a rotatable plate and a plurality of V-shaped ribs thereon, of a, plurality of transverse ribs interposed between the free ends of the V-shaped ribs and joined thereto, said transverse ribs being of less height than the V-shaped ribs and being beveled on their inner sides.

3. The combination with a rotatable plate, and a plurality of V-shaped ribs thereon, of a plurality of transverse ribs interposed between the free ends of the V- shaped ribs, said transverse ribs being of less height than the V-shaped ribs and radial ribs having their outer ends abutting' said transverse ribs, their inner ends abutting the angles of the V-shaped ribs.

4. The combination with a rotatable plate, and a plurality of V-shaped ribs thereon, of a plurality of ridge shaped radial ribs interposed between the arms of said V-shaped ribs, said ridge shaped ribs increasing in thickness and width from one end to the other.

5. The combination with a rotatable plate and a plurality of V-shaped ribs thereon, of a plurality of transverse ribs interposed between the free ends of said V-shaped ribs, said transverse ribs being of less height than the V-shaped ribs, and ridge shaped ribs having their outer ends abutting the transverse ribs, said ridge shaped ribs gradually decreasing in thickness from the ends thereof located between the free ends of the V- shaped` ribs tothe angles of said V-shaped ribs.

6. The combination with a rotatable plate and a plurality of V-shaped ribs thereon, of a plurality of transverse ribs interposed between the free ends of said V-shaped ribs, said transverse ribs being of less height than the V-shaped ribs, and ridge shaped ribs having one of their ends abutting said transverse ribs, said ridge shaped ribs decreasing in height and width from their juncture with the transverse ribs to their opposite ends. p

7. The combination with a rotatable plate and a plurality of V-shaped ribs thereon, of a plurality of transverse ribs interposed between the free ends of said V-shaped ribs and having their inner sides beveled, and radial ribs having their opposite ends abutting the transverse ribs and angles of the V- shaped ribs, said radial ribs decreasing in width and thickness from their juncture with the transverse ribs to their inner ends and having their side portions gradually decreased in thickness from their radial centers to their side edges, the bevels of said transverse ribs blending with the inclined side portions of said radial ribs, the transverse ribs being of less height than the V.- shaped ribs.

8. rl`he combination with a rotatable plate and a number of V-shaped ribs thereon, of. a plurality of radial ribs interposed between the arms of the V-shaped ribs and lying centrally therebetween, said radial ribs and the V-shaped ribs being of the same height, transverse ribs between the free ends of said arms of the V-shaped ribs and the free ends of the radial ribs therebetween, said transverse ribs being united at their opposite ends to said arms and radial ribs and being of less height than the same, and ridge shaped ribs having one of their ends abutting the transverse ribs, said ridge shaped ribs decreasing in width and thickness from their juncture with the transverse ribs toward their other ends.

9. The combination with a rotatable plate and a number of V-shaped ribs thereon, of radial ribs interposed between the arms of said V-shaped ribs and lying centrally therebetween, said radial ribs having the ends thereof located adjacent the angles of the V-shaped ribs decreased in thickness, transverse ribs joined at their opposite ends to the free ends of the V-shaped ribs and to the free ends of the radial ribs, and ridge shaped ribs joined at one end to the transverse ribs, said ridge shaped ribs decreasing in width and thickness from their juncture with said transverse ribs toward their other ends.

p 10. A device of the character described comprising a rotatable plate, and a number of substantially annular Zig zag ribs thereon, the inner angles of said ribs being provided With strictly radial grooves for the purpose set forth.

11. A device of the character described comprising a rotatable plate, a number of grinding ribs thereon and located near the outer edge portion thereof and a plurality of radial crushing ribs on the inner edge portion of said plate, said crushing ribs having radial grooves in their active faces.

1Q. In a device of the character described a rotatable plate, a plurality7 of grinding ribs thereon and located upon the outer edge portion thereof, and a plurality of radial crushing ribs on the inner edge portion of said plate, said crushing ribs having radial grooves in their active faces, said grooves increasing in depth from their outer to their inner ends for the purpose set forth.

13. In a device of the character described, a rotatable plate having a curved inner edge, a plurality of grinding ribs upon the outer edge portion of said plate and a plurality of radial crushing ribs on the inner edge portion thereof and terminating flush With said curved inner edge of the plate at their inner ends, certain of said inner ends being beveled for the purpose set forth.

In testimony whereof I have hereunto set my hand in presence of two subscribing Witnesses.

VILLIAM VAN N OSTRAND.

Witnesses:

J. E. LYON, V. E. BALDWIN.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents. Washington, D. C." 

